Hearing systems, sensor systems, and methods for detecting a physiological attribute of a user

A hearing system configured to assist a user in hearing, the hearing system comprising:

• an in-the-ear (ITE) component configured to fit at least partially within an ear canal of the user while the hearing system is worn by the user, the ITE component comprising a shell that is formed of a conductive material and that is configured to fit at least partially within the ear canal of the user;
• a behind-the-ear (BTE) component that is communicatively coupled to the ITE component;
• a cable that couples the BTE component to the ITE component;
• a first sensor electrode provided on an outer surface of the shell of the ITE component and configured to contact, while the hearing system is worn by the user, outer ear tissue of the user;
• and
• a second sensor electrode provided as part of a conductive outer coating of the cable and configured to contact at least some of the outer ear tissue between the BTE component and the ITE component when the hearing system is worn by the user,
• wherein the first sensor electrode and the second sensor electrode are configured to be used to detect a physiological attribute of the user while the hearing system is worn by the user.